Download Benefits of Voltage Optimisation

Engineered to the highest standards, our Wilson VO units are
manufactured to suite your individual site’s needs. This means
we can provide you with the equipment you actually require
and can achieve impressive cost savings when compared with
leading suppliers.
Payback under 12 months time –
Working hard for you and the environment
What’s more, our prices are based on the cost of manufacture and not the
projected savings you make.
This way we help you achieve surprisingly short payback times of typically 18 and
often less than 12 months. And because we don’t compromise on quality you are
safe in the knowledge that you made your budget work extra hard, both for you
and the environment.
Honest, straight forward equipment
Our Wilson VO units are auto transformers with fixed voltage tappings to optimise
your output voltage. In addition the units feature a closed loop delta winding to
suppress any harmonics that appear in the system (typically 3rd, 5th & 7th). The
Wilson VO windings are made from highly conductive copper and have cores from
cold rolled grade orientated steel laminations. Nothing more and nothing less.
Benefits of Voltage Optimisation
from Wilson Power Solutions
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Cost effective solutions deliver optimised supply voltage
Payback typically achieved within 18 months
Equipment life prolonged and maintenance reduced
Measureable savings in energy consumption
Operating costs lowered by average of 13% per annum
Carbon footprint reduced through decreased CO2 emissions
Expertise of Wilson’s power engineering team
Quality Voltage Optimisation equipment at highly
competitive prices: The engineers choice
What is Voltage Optimisation?
See page 2
Wilson VO – the engineers choice
Ohm’s Law
What is Voltage Optimisation?
Put simply, Voltage Optimisation is an energy-saving technique
that systematically reduces the supply voltage to a site in order
to reduce the energy losses in equipment.
With increasing pressure to reduce energy consumption and minimise their
carbon footprint, a significant number of businesses are starting to explore
the benefits of Voltage Optimisation to help reduce energy waste.
How Voltage Optimisation can work for you
We keep our proposition simple, so it is easily understood by those of our
customers who are not engineers but who we want to help understand
more about the VO; the Wilson’s ‘no frills’ approach, and our ability to help
reduce both your energy costs and associated emissions on a budget.
Power in terms of Current and Voltage
Simply put P = I x V
Or Power = Current x Voltage
Alt. Watts = Amps x Volts
It follows that for a constant power situation then reducing voltage will
cause the current to rise. If this is the case, how does the VO work to save
you energy?
A common misunderstanding
Ohms law provides the relationship between (E) voltage,
(I) current, and (R) resistance. Alternatively it can be
stated one ohm is the resistance value through which one
volt will maintain a current of one ampere. In a little more
detail.
(I) Current flows through a wire or conductor like water
flowing down a river. Current flows from negative to
positive mainly on the surface of a conductor (metal).
It is measured in amperes (a) or amps.
(E) Voltage is the difference in electrical potential
between 2 points in a given circuit. It’s the push or
pressure causing the current to flow through a circuit.
It is measure in volts (v).
(R) Resistance determines how much current will flow
through any component. Resistors are used to control
voltage and current levels in any circuit. A very high
resistance allows a small value of current to flow; a
very low resistance allows a large amount of current
to flow for a given voltage. It is measured in ohms.
Finally we can include for completeness power from our
other formula:
(P) Power is the product of quantity of current multiplied
by voltage Level applicable at a given point. It is
measured in watts.
Combining Ohm’s Law with Power Formula for Voltage
Optimisation
Reminder : V = I x R so that I = V/R
The notion that electrical loads always have constant power is not correct.
For example, if an input current or voltage should vary, it does not follow
that the other quantity will variation to maintain the existing power level.
Therefore the formula P = I x V means that the power used is the product
of both current flowing and voltage applied. It depends on the NATURE or
TYPE of load concerned.
P = I x V
An effective solution
This last formula is fundamentally important as it
suggests that by reducing voltage, the power taken will
also reduce as the square of the voltage resulting in a
saving of energy.
Energy saving through Voltage Optimisation is based on the principle that
the nameplate power of a device, such as 1kW for an electric fire, will be
delivered at any voltage within an operating range. In the UK the range is
207V to 253V. However, above optimum voltage, any additional energy
used will not necessarily improve performance. A device that has been
designed to work anywhere in Europe, such as our electric fire, has an
optimum operating point of 220V.
Above this voltage and at the UK supply average of 242V, the fire will deliver
its heat output of 1kW plus some, but the additional power dissipated will
increase running costs whilst the extra heat may not be required and will
shorten equipment life.
The solution? Remove the difference between the existing supply voltage
and the optimum design voltage, allowing the electrical device or
equipment to operate at its most efficient level without affecting its
performance.
so that P = V2/R
Here (I) is the current thro’ a resistance in amps, (V) is the
potential difference measured across the resistance in
volts and (R) is the resistance of the conductor in ohms.
Moreover Ohm’s law states that (R) in this relation is
constant – independent of the current.
Put another way - an 8% reduction in supply voltage
from 240V to approx 220V. With a 20 ohm load will
cause the utilised power to drop from 2880W to
2420W representing a 16% saving. Of course, not all
real electrical equipment can be modelled as a simple
resistance in AC circuits. Some equipment, particularly
modern devices that use electronic power supplies,
behave slightly differently.
So the overall saving from a typical installation is around
11 -13% for the given voltage reduction rather than the
full 16% predicted by Ohm’s law.
Wilson VO – the engineers choice
Electrical characteristics and performance data
Um
Application
Rating Power – Air Cooling (AN)
Data
Voltage Optimiser
kVA
1000
Secondary Winding
V
400
Max Current
A
1450
Primary Tappings
%
Minus (-) 7,8,9,10,11,12
Primary Connection
Star
Vector Group
Yn
Harmonic capture
Closed Loop Delta
Insulating Class
kV
1.1/3/-
Core Loss
W
600
Impedance @ 75°C (AN)
%
< 2%
Noise Emission Lpa
dB (A)
< 50
Supply Frequency
Hz
50
Partial Discharge Value
pC
< 10
Secondary Insulating Class
F
Temperature Rise
°C
155
Protection Class
IP
00
ENVIRMOENTAL & CONSTRUCTION DATA
Vacuum Impregnated
Yes
Winding / Coil Material
Cu/Cu
Lamination Type
M5T30
Core Steel (Insulated)
CRGO
Ambient Temperature
°C
-25 to +40
Humidity
%
80
Installation
m
≤ 1000 a.s.l.
Climatic Withstand EN 60076
C2
Environmental Withstand EN 60076
E2
Dimensions A x B x C
Weight
mm
kg
Quick payback times and uncompromised
quality: Our Wilson VO units are manufactured
to suit your site’s exact requirements and thus
provide you with the highest quality equipment
at convincingly low prices.
Wilson VO features
 Closed loop delta windings
to suppress harmonics
 Fixed Voltage tappings
to optimise output voltage
 No moving parts
= virtually maintenance free